For women, thinning hair or hair loss can be a sign of a problem in the gastrointestinal tract.
It could be a sign of insufficient stomach acids; It could also mean a
deficiency of protein, zinc and other nutrients. Taking two acidophilus tablets
after or between meals (four to six tablets per day) for two months will
help.

For men, balding process can be slowed down by taking a low-fat diet. Some scientists postulate that the male pattern baldness is tied to increased testosterone levels during
puberty. A high-fat, meat-based diet raises testosterone levels, and that may adversely affect hair follicles.
For example, in Japan, male pattern baldness was very rare prior to World War II when the diet
was lean and healthy. The Japanese now consume a more fatty,
Westernized diet. Baldness is now increasing substantially among Japanese men. Eating low-fat foods may not stop hair loss; but it might help slow down the hair loss.

Anemia is one of the most frequent causes of hair loss. Eat plenty of iron-rich foods, like liver (Avoid if you are
pregnant) and other organ meat, whole grain cereals, dark green leafy vegetables, eggs, dates, and raisins.

The hair is comprised mostly of
protein. To encourage hair growth, adhere to a diet rich in protein. A
recommended diet for this purpose includes calves liver, brewer's yeast, wheat germ, and two tablespoons of granulated lecithin.
Along with protein, these foods are also high in B vitamins, an
important nutrient for hair.

European studies have found that soy protein reinforces hair and stimulates
its growth. In one study, The hair growth increased by 15 percent. Tofu
and soy milk are good sources of soy protein. Other good sources of protein are:
low-fat cheese, eggs, fish, beans, brewer's yeast and yogurt.

Another important nutrient for hair health is silica. Studies in the former Soviet Union have
shown that silica therapy slowed hair loss. Organic silica added to
shampoo was found to help prevent baldness, stimulate healthier hair growth and assure beautiful shine, luster and strength. Some scientists claim that they have effectively stopped further hair loss by adding silica to their shampoo. This can be applied externally to regrow already lost hair.

Silica is found in the outer coverings of potatoes, green and red peppers and cucumbers. Bean sprouts are also high in silica.
Eat whole foods including sprouts.

Vitamin C improves the absorption of iron.
Include a good serving of fruits and vegetables in your diet.

Vitamin E is important for healthy hair
growth. Eat avocados, nuts, seeds, and olive oil on a regular basis.

If hair loss is due to thyroid dysfunction, eat more foods rich in vitamin A and iodine. Eat vegetables such as carrots or spinach in unrefined, cold-pressed seed oils such as flax, walnut or pumpkin seed and sea salt. Take turnips, cabbage, mustard, soy beans, peanuts, pine nuts and millet if there is a deficiency of iodine.